Liquefied natural gas sampling and collecting device

Abstract

The utility model discloses a liquefied natural gas sampling and collecting device which comprises a collecting needle cylinder, a piston rod, a piston, a sampling nozzle, an elastic rubber sheet, a screw rod and a limiting rod, the sampling nozzle is arranged at the bottom end of the collecting needle cylinder and communicated with the collecting needle cylinder, the slidable piston is arranged in the collecting needle cylinder, and the piston rod fixed with the piston is arranged at the top end of the piston. The piston rod is in sliding connection with the collection needle cylinder, the top end of the piston rod extends to the outer side of the top end of the collection needle cylinder, an elastic rubber sheet is fixedly installed in the sampling nozzle, a liquid inlet hole is formed in the center of the elastic rubber sheet and is of a big-end-down circular truncated cone structure, an installation opening is formed in one side of the collection needle cylinder, and a screw is arranged at the installation opening; a limiting rod is arranged at the inner end of the screw rod, the limiting rod is coaxial with the screw rod and fixedly connected with the screw rod, the limiting rod is inserted into the collecting needle cylinder, and a plurality of limiting insertion openings are formed in the outer wall of one side of the piston rod and are uniformly arranged at intervals. According to the utility model, reliable sampling and storage can be realized.

Description

Technical Field

[0001] This utility model relates to the field of natural gas sampling technology, and in particular to a liquefied natural gas sampling and collection device. Background Technology

[0002] Liquefied natural gas (LNG), whose main component is methane, is widely recognized as the cleanest fossil fuel on Earth. It is colorless, odorless, non-toxic, and non-corrosive. Its volume is approximately 1 / 625th that of the same amount of gaseous natural gas, and its mass is only about 45% that of the same volume of water. The manufacturing process involves purifying natural gas produced from gas fields, followed by a series of cryogenic liquefaction processes, and then transporting it using LNG ships. LNG combustion produces very little air pollution and releases a large amount of heat, making it a relatively advanced energy source. Sampling equipment is required when sampling LNG.

[0003] Most current liquefied natural gas (LNG) sampling devices use a syringe suction method. The piston of the syringe can be accidentally pushed, leading to natural gas leakage. Utility Model Content

[0004] The purpose of this application is to provide a liquefied natural gas sampling and collection device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a liquefied natural gas sampling and collection device, comprising a collection syringe, a piston rod, a piston, a sampling nozzle, an elastic rubber sheet, a screw, and a limiting rod. The bottom end of the collection syringe is provided with a sampling nozzle, which communicates with the collection syringe. Inside the collection syringe is a piston that slides along its length. At the top of the piston is a piston rod fixedly connected to it. The piston rod and the collection syringe are slidably connected, with its top extending to the outer side of the top of the collection syringe. An elastic rubber sheet is fixedly installed inside the sampling nozzle. A liquid inlet hole is opened at the center of the elastic rubber sheet. The liquid inlet hole has a frustum-shaped structure, wider at the bottom and narrower at the top. One side of the collection syringe has an installation port, and a screw is provided at the installation port. The inner end of the screw is provided with a limiting rod, which is coaxial with and fixedly connected to the screw. The limiting rod is inserted into the interior of the collection syringe. A limiting insertion port is opened on the outer wall of one side of the piston rod, and several limiting insertion ports are evenly spaced along the length of the piston rod.

[0006] Preferably, the limiting rod and the limiting socket are adapted to be plugged in.

[0007] Preferably, a sealing ring is fixedly installed at the top of the collecting syringe, and the sealing ring and the piston rod are adapted to seal.

[0008] Preferably, the outer wall of the collecting syringe is provided with an observation window, and the observation window is provided with a liquid level scale.

[0009] Preferably, a flexible rubber sleeve is fitted and fixedly installed at the top end of the piston rod.

[0010] Preferably, the screw and the mounting port are threaded together.

[0011] In summary, the technical effects and advantages of this utility model are as follows:

[0012] In this invention, by pulling the piston rod, the piston slides and generates negative pressure, which draws natural gas liquid into the inlet of the sampling nozzle, causing the inlet to expand. After the piston rod is stopped from being pulled, the inlet shrinks under the elastic force of the elastic rubber sheet, preventing liquid from flowing out from there. By rotating the screw, the limiting rod is inserted into the limiting socket on the side of the piston rod, thus limiting the piston rod and preventing accidental contact. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a liquefied natural gas sampling and collection device according to an embodiment of this application;

[0015] Figure 2 This is a cross-sectional structural schematic diagram of a liquefied natural gas sampling and collection device according to an embodiment of this application.

[0016] In the diagram: 1. Collection syringe; 2. Piston rod; 3. Piston; 4. Sampling nozzle; 5. Elastic rubber sheet; 6. Liquid inlet; 7. Mounting port; 8. Screw; 9. Limiting rod; 10. Limiting socket; 11. Sealing ring; 12. Flexible rubber sleeve; 13. Observation window; 14. Liquid level scale. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] It should also be noted that all standard parts used in this application are commercially available, and can be custom-made according to the description and drawings. Unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances, and unless explicitly limited, machinery, parts, and equipment can all adopt conventional models in the prior art.

[0020] In this document, the term "comprising" is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] Example: Reference Figure 1-2The liquefied natural gas (LNG) sampling and collection device shown includes a collection syringe 1, a piston rod 2, a piston 3, a sampling nozzle 4, an elastic rubber sheet 5, a screw 8, and a limiting rod 9. The sampling nozzle 4 is located at the bottom of the collection syringe 1 and is connected to it. Inside the collection syringe 1, a piston 3 slides along its length. At the top of the piston 3, a piston rod 2 is fixedly connected to it. The piston rod 2 is slidably connected to the collection syringe 1, and its top extends to the outer side of the top of the collection syringe 1. An elastic rubber sheet 5 is fixedly installed inside the sampling nozzle 4. A liquid inlet 6 is formed at the center of the elastic rubber sheet 5, and the liquid inlet 6 has a frustum-shaped structure that is larger at the bottom and smaller at the top. An installation port is located on one side of the collection syringe 1. A screw 8 is provided at the mounting port 7, and a limiting rod 9 is provided at the inner end of the screw 8. The limiting rod 9 is coaxial with the screw 8 and fixedly connected to it. The limiting rod 9 is inserted into the inside of the collecting syringe 1. A limiting insertion port 10 is provided on one side of the outer wall of the piston rod 2. Several limiting insertion ports 10 are provided and are evenly spaced along the length of the piston rod 2. By pulling the piston rod, the piston slides and generates negative pressure, which allows natural gas liquid to be drawn in from the liquid inlet of the sampling nozzle. The liquid inlet expands. After the piston rod is stopped from being pulled, the liquid inlet shrinks under the elastic force of the elastic rubber sheet to prevent liquid from flowing out from this point. By rotating the screw, the limiting rod is inserted into the limiting insertion port on the side of the piston rod to limit the piston rod and prevent it from being accidentally touched.

[0022] With the above structure, the limiting rod 9 and the limiting socket 10 are adapted to be inserted into each other.

[0023] With the above structure, a sealing ring 11 is fixedly installed at the top of the collecting syringe 1, and the sealing ring 11 and the piston rod 2 are adapted to seal.

[0024] With the above structure: the outer wall of the collecting syringe 1 is provided with an observation window 13, and the observation window 13 is provided with a liquid level scale 14.

[0025] With the above structure, a flexible rubber sleeve 12 is fitted and fixed at the top of the piston rod 2 to protect the hand.

[0026] With the above structure, the screw 8 and the mounting port 7 are threaded together.

[0027] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquefied natural gas sample collection device, characterized by: Including collection needle cylinder (1), piston rod (2), piston (3), sampling nozzle (4), elastic rubber sheet (5), screw rod (8) and limit rod (9), the bottom end of the collection needle cylinder (1) is provided with a sampling nozzle (4), the sampling nozzle (4) and the collection needle cylinder (1) are communicated, the inside of the collection needle cylinder (1) is provided with a piston (3) sliding along the length direction thereof, the top end of the piston (3) is provided with a piston rod (2) fixedly connected therewith, the piston rod (2) and the collection needle cylinder (1) are slidingly connected and the top end thereof extends to the outside of the top end of the collection needle cylinder (1), the inside of the sampling nozzle (4) is fixedly installed with an elastic rubber sheet (5), the center of the elastic rubber sheet (5) is provided with a liquid inlet hole (6), the liquid inlet hole (6) is a circular truncated cone structure with large bottom and small top, one side of the collection needle cylinder (1) is provided with a mounting port, the mounting port (7) is provided with a screw rod (8), the inner end of the screw rod (8) is provided with a limit rod (9), the limit rod (9) is coaxial with the screw rod (8) and is fixedly connected with the screw rod (8), the limit rod (9) is inserted into the inside of the collection needle cylinder (1), a limit insertion port (10) is formed on the outer wall of one side of the piston rod (2), the limit insertion port (10) is provided with a plurality of limit insertion ports and is uniformly and spacedly arranged along the length direction of the piston rod (2).

2. A device for collecting samples of liquefied natural gas according to claim 1, characterized in that: The limit rod (9) and the limit insertion port (10) are adaptively inserted.

3. The LNG sampling collection device of claim 1, wherein: A sealing rubber ring (11) is fixedly installed at the top end of the collection needle cylinder (1), and the sealing rubber ring (11) and the piston rod (2) are adaptively sealed.

4. The LNG sampling collection device of claim 1, wherein: The outer wall of the collection needle cylinder (1) is provided with an observation strip window (13), and the observation strip window (13) is provided with a liquid level scale (14).

5. The LNG sampling collection device of claim 1, wherein: A flexible rubber sleeve (12) is fixedly installed at the top end of the piston rod (2).

6. The LNG sampling collection device of claim 1, wherein: The screw rod (8) and the mounting port (7) are threadedly connected.

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